package com.itheima.controller;

import com.alibaba.dubbo.config.annotation.Reference;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.itheima.constant.MessageConstant;
import com.itheima.entity.Result;
import com.itheima.service.MemberService;
import com.itheima.service.ReportService;
import com.itheima.service.SetmealService;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * 报表操作
 */
@RestController
@RequestMapping("/report")
public class ReportController {
    @Reference
    private MemberService memberService;
    @Reference
    private SetmealService setmealService;
    @Reference
    private ReportService reportService;


    // 会员数量折线图数据
    @RequestMapping("/getMemberReport")
    public Result getMemberReport() {

        Map<String, Object> map = new HashMap<>();
        List<String> months = new ArrayList<>();
        Calendar calendar = Calendar.getInstance();  // 获得日历对象，模拟时间

        // 计算过去一年12个月
        calendar.add(Calendar.MONTH, -12);  // 获得当前时间往前推12个月的时间
        for (int i = 0; i < 12; i++) {
            calendar.add(Calendar.MONTH, 1);  // 获得当前时间往后推一个月日期
            Date date = calendar.getTime();
            months.add(new SimpleDateFormat("yyyy-MM").format(date));
        }
        map.put("months", months);

        List<Integer> memberCount = memberService.findMemberCountByMonths(months);
        map.put("memberCount", memberCount);

        return new Result(true, MessageConstant.GET_MEMBER_NUMBER_REPORT_SUCCESS, map);
    }

    /**
     * 套餐占比统计：套餐数及套餐名称
     */
    @RequestMapping("/getSetmealReport")
    public Result getSetmealReport() {
        // 获取套餐预约数
        List<Map<String, Object>> list = setmealService.findSetmealCount();
        // map集合存入套参数及套餐名称
        Map<String, Object> map = new HashMap<>();
        map.put("setmealCount", list);

        List<String> setmealNames = new ArrayList<>();
        for (Map<String, Object> m : list) {
            String name = (String) m.get("name");
            setmealNames.add("name");
        }
        map.put("setmealNames", setmealNames);
        return new Result(true, MessageConstant.GET_SETMEAL_COUNT_REPORT_SUCCESS, map);
    }

    /**
     * 套餐预约数占比饼状图，统计运营统计数据
     */
    @RequestMapping("/getBusinessReportData")
    public Result getBusinessReportData() {
        try {
            Map<String, Object> result = reportService.getBussinessReport();
            return new Result(true, MessageConstant.GET_BUSINESS_REPORT_SUCCESS, result);
        } catch (Exception e) {
            e.printStackTrace();
            return new Result(false, MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }

    /**
     * 导出报表：POI方式
     *  提前设计一个excel模板文件，程序读取文件，将数据填充进去，省去了格式设置
     */
    @RequestMapping("/exportBusinessReport")
    public Result exportBusinessReport(HttpServletRequest request, HttpServletResponse response) {
        try {
            Map<String, Object> result = reportService.getBussinessReport();
            // 取出返回结果数据，准备将报表数据写入到Excel文件中
            String reportDate = (String) result.get("reportDate");
            Integer todayNewMember = (Integer) result.get("todayNewMember");
            Integer totalMember = (Integer) result.get("totalMember");
            Integer thisWeekNewMember = (Integer) result.get("thisWeekNewMember");
            Integer thisMonthNewMember = (Integer) result.get("thisMonthNewMember");
            Integer todayOrderNumber = (Integer) result.get("todayOrderNumber");
            Integer thisWeekOrderNumber = (Integer) result.get("thisWeekOrderNumber");
            Integer thisMonthOrderNumber = (Integer) result.get("thisMonthOrderNumber");
            Integer todayVisitsNumber = (Integer) result.get("todayVisitsNumber");
            Integer thisWeekVisitsNumber = (Integer) result.get("thisWeekVisitsNumber");
            // 本月到诊数
            Integer thisMonthVisitsNumber = (Integer) result.get("thisMonthVisitsNumber");
            // 热门套餐
            List<Map> hotSetmeal = (List<Map>) result.get("hotSetmeal");

            // 获得Excel模板文件绝对路径
            // File.separator 根据当前系统使用什么样的目录分隔符，windows支持斜杠/和反斜杠\，而Linux仅支持斜杠/
            String filePath = request.getSession().getServletContext().getRealPath("template") + File.separator + "report_template.xlsx";
            //基于提供的Excel模板文件在内存中创建一个Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(new FileInputStream(new File(filePath)));
            //读取第一个工作表
            XSSFSheet sheet = excel.getSheetAt(0);

            XSSFRow row = sheet.getRow(2);
            row.getCell(5).setCellValue(reportDate);//日期

            row = sheet.getRow(4);
            row.getCell(5).setCellValue(todayNewMember);//新增会员数（本日）
            row.getCell(7).setCellValue(totalMember);//总会员数

            row = sheet.getRow(5);
            row.getCell(5).setCellValue(thisWeekNewMember);//本周新增会员数
            row.getCell(7).setCellValue(thisMonthNewMember);//本月新增会员数

            row = sheet.getRow(7);
            row.getCell(5).setCellValue(todayOrderNumber);//今日预约数
            row.getCell(7).setCellValue(todayVisitsNumber);//今日到诊数

            row = sheet.getRow(8);
            row.getCell(5).setCellValue(thisWeekOrderNumber);//本周预约数
            row.getCell(7).setCellValue(thisWeekVisitsNumber);//本周到诊数

            row = sheet.getRow(9);
            row.getCell(5).setCellValue(thisMonthOrderNumber);//本月预约数
            row.getCell(7).setCellValue(thisMonthVisitsNumber);//本月到诊数

            int rowNum = 12;
            for (Map map : hotSetmeal) {//热门套餐
                String name = (String) map.get("name");
                Long setmeal_count = (Long) map.get("setmeal_count");
                BigDecimal proportion = (BigDecimal) map.get("proportion");
                row = sheet.getRow(rowNum++);
                row.getCell(4).setCellValue(name);//套餐名称
                row.getCell(5).setCellValue(setmeal_count);//预约数量
                row.getCell(6).setCellValue(proportion.doubleValue());//占比
            }

            //使用输出流进行表格下载,基于浏览器作为客户端下载
            OutputStream out = response.getOutputStream();
            response.setContentType("application/vnd.ms-excel");//代表的是Excel文件类型
            response.setHeader("content-Disposition", "attachment;filename=report.xlsx");//指定以附件形式进行下载
            excel.write(out);

            out.flush();
            out.close();
            excel.close();
            return null;
        } catch (Exception e) {
            return new Result(false, MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }

    /**
     * 导出报表：EasyExcel方式填充
     *  提前设计一个excel模板文件，程序读取文件，将数据填充进去，省去了格式设置
     */
    @RequestMapping("/exportEasyReport")
    public Result exportEasyReport(HttpServletRequest request, HttpServletResponse response) {
        try{
            String templateFileName = request.getSession().getServletContext().getRealPath("template")+ File.separator+"report_template_2.xlsx";

            Map<String,Object> result = reportService.getBussinessReport();
            // 方案2 分多次 填充 会使用文件缓存（省内存）
            ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream()).withTemplate(templateFileName).build();
            WriteSheet writeSheet = EasyExcel.writerSheet(0).build();
            excelWriter.fill(result, writeSheet);
            List<Map> hotSetmeal = (List<Map>) result.get("hotSetmeal");
            excelWriter.fill(hotSetmeal, writeSheet);
            response.setContentType("application/vnd.ms-excel");
            response.setCharacterEncoding("utf-8");
            // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
            String fileName = URLEncoder.encode("运营数据信息报表", "UTF-8");
            response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
            // 千万别忘记关闭流
            excelWriter.finish();
            return new Result(true,MessageConstant.GET_BUSINESS_REPORT_SUCCESS);
        }catch (Exception e){
            e.printStackTrace();
            return new Result(false, MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }


}
